Engine coolant for drill bit lubricant?

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66
Location
PA
I have to do some drilling into metal. Advice is to use a a cutting oil, Kroil or transmission fluid. I have some engine coolant, could I use that? Thanks
 
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25,948
Location
MA, Mittelfranken.de
Any kind of engine oil will do also, 3 in 1 is better than nothing. Run the bit a slower speed to reduce heat. Coolant used for cutting tools contains water soluble oil, grinders can use straight coolant.
 
Messages
3,558
Location
SE Pa
Originally Posted By: Trav
Any kind of engine oil will do also, 3 in 1 is better than nothing. Run the bit a slower speed to reduce heat. Coolant used for cutting tools contains water soluble oil, grinders can use straight coolant.
What? You don't like the smell of Prestone in the morning? That's right there with packing the front bearings with bacon grease. wink
 
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5,532
Location
Canada
9 times out of 10 WD40 is easy to use (via the tube) and gets the job done. Bigger jobs get a cutting oil emulsion.
 
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